131401031 has 2 divisors, whose sum is σ = 131401032. Its totient is φ = 131401030.

The previous prime is 131401027. The next prime is 131401037. The reversal of 131401031 is 130104131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131401031 - 2² = 131401027 is a prime.

It is a super-2 number, since 2×131401031² = 34532461895725922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 131400997 and 131401015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131401037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65700515 + 65700516.

It is an arithmetic number, because the mean of its divisors is an integer number (65700516).

Almost surely, 2^131401031 is an apocalyptic number.

131401031 is a deficient number, since it is larger than the sum of its proper divisors (1).

131401031 is an equidigital number, since it uses as much as digits as its factorization.

131401031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 131401031 is about 11463.0288754761. The cubic root of 131401031 is about 508.3930336644.

Adding to 131401031 its reverse (130104131), we get a palindrome (261505162).

The spelling of 131401031 in words is "one hundred thirty-one million, four hundred one thousand, thirty-one".